<!doctype html>
<html lang="zh-CN">
<head>

    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    
    <meta name="referrer" content="no-referrer-when-downgrade">
    

    <title>Flutter面试题3之常见开发问题 | 早起的年轻人</title>
    <meta property="og:title" content="Flutter面试题3之常见开发问题 - 早起的年轻人">
    <meta property="og:type" content="article">
        
    <meta property="article:published_time" content='2021-08-21T09:23:38&#43;08:00'>
        
        
    <meta property="article:modified_time" content='2021-08-21T09:23:38&#43;08:00'>
        
    <meta name="Keywords" content="Flutter，golang,go语言,go语言笔记,飞雪无情,java,android,博客,项目管理,python,软件架构,公众号,小程序">
    <meta name="description" content="Flutter面试题3之常见开发问题">
        
    <meta name="author" content="luckly">
    <meta property="og:url" content="https://luckly.work/post/Flutter/flutter%E9%9D%A2%E8%AF%95%E9%A2%983%E4%B9%8B%E5%B8%B8%E8%A7%81%E5%BC%80%E5%8F%91%E9%97%AE%E9%A2%98/">
    <link rel="shortcut icon" href='/favicon.ico'  type="image/x-icon">

    <link rel="stylesheet" href='/css/normalize.css'>
    <link rel="stylesheet" href='/css/style.css'>
    <script type="text/javascript" src="//cdn.bootcdn.net/ajax/libs/jquery/3.4.1/jquery.min.js"></script>

    
    
    
        <link href="https://cdn.bootcdn.net/ajax/libs/fancybox/3.5.7/jquery.fancybox.min.css" rel="stylesheet">
    
    
    
    
        <link rel="stylesheet" href='/css/douban.css'>
    
        <link rel="stylesheet" href='/css/other.css'>
    
</head>

<link rel="stylesheet"
      href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/11.2.0/styles/default.min.css">
<script src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/11.2.0/highlight.min.js"></script>
<body>
    <header id="header" class="clearfix">
    <div class="container">
        <div class="col-group">
            <div class="site-name ">
                
                    <a id="logo" href="https://luckly.work/">
                        早起的年轻人
                    </a>
                
                <p class="description">专注于Flutter、Android、Java、Go语言(golang)、移动互联网、项目管理、软件架构</p>
            </div>
            <div>
                <nav id="nav-menu" class="clearfix">
                    <a class="current" href="https://luckly.work/">首页</a>
                    
                    <a  href="https://luckly.work/categories/" title="分类">分类</a>
                    
                    <a  href="https://luckly.work/tags/" title="标签">标签</a>
                    
                    <a  href="https://luckly.work/archives/" title="归档">归档</a>
                    
                    <a  href="https://luckly.work/about/" title="关于我">关于我</a>
                    
                    <a  href="https://github.com/ITmxs/" title="github">github</a>
                    
                </nav>
            </div>
        </div>
    </div>
</header>

    <div id="body">
        <div class="container">
            <div class="col-group">

                <div class="col-8" id="main">
                    
<div class="res-cons">
    <style type="text/css">
    .post-toc {
        position: fixed;
        width: 200px;
        margin-left: -210px;
        padding: 5px 10px;
        font-family: Athelas, STHeiti, Microsoft Yahei, serif;
        font-size: 12px;
        border: 1px solid rgba(0, 0, 0, .07);
        border-radius: 5px;
        background-color: rgba(255, 255, 255, 0.98);
        background-clip: padding-box;
        -webkit-box-shadow: 1px 1px 2px rgba(0, 0, 0, .125);
        box-shadow: 1px 1px 2px rgba(0, 0, 0, .125);
        word-wrap: break-word;
        white-space: nowrap;
        -webkit-box-sizing: border-box;
        box-sizing: border-box;
        z-index: 999;
        cursor: pointer;
        max-height: 70%;
        overflow-y: auto;
        overflow-x: hidden;
    }

    .post-toc .post-toc-title {
        width: 100%;
        margin: 0 auto;
        font-size: 20px;
        font-weight: 400;
        text-transform: uppercase;
        text-align: center;
    }

    .post-toc .post-toc-content {
        font-size: 15px;
    }

    .post-toc .post-toc-content>nav>ul {
        margin: 10px 0;
    }

    .post-toc .post-toc-content ul {
        padding-left: 20px;
        list-style: square;
        margin: 0.5em;
        line-height: 1.8em;
    }

    .post-toc .post-toc-content ul ul {
        padding-left: 15px;
        display: none;
    }

    @media print,
    screen and (max-width:1057px) {
        .post-toc {
            display: none;
        }
    }
</style>
<div class="post-toc" style="position: absolute; top: 188px;">
    <h2 class="post-toc-title">文章目录</h2>
    <div class="post-toc-content">
        <nav id="TableOfContents"></nav>
    </div>
</div>
<script type="text/javascript">
    $(document).ready(function () {
        var postToc = $(".post-toc");
        if (postToc.length) {
            var leftPos = $("#main").offset().left;
            if(leftPos<220){
                postToc.css({"width":leftPos-10,"margin-left":(0-leftPos)})
            }

            var t = postToc.offset().top - 20,
                a = {
                    start: {
                        position: "absolute",
                        top: t
                    },
                    process: {
                        position: "fixed",
                        top: 20
                    },
                };
            $(window).scroll(function () {
                var e = $(window).scrollTop();
                e < t ? postToc.css(a.start) : postToc.css(a.process)
            })
        }
    })
</script>
    <article class="post">
        <header>
            <h1 class="post-title">Flutter面试题3之常见开发问题</h1>
        </header>
        <date class="post-meta meta-date">
            2021年8月21日
        </date>
        
        <div class="post-meta">
            <span>|</span>
            
            <span class="meta-category"><a href='/categories/Flutter'>Flutter</a></span>
            
        </div>
        
        
        <div class="post-meta">
            <span id="busuanzi_container_page_pv">|<span id="busuanzi_value_page_pv"></span><span>
                    阅读</span></span>
        </div>
        
        
        <div class="post-content">
            <blockquote>
<p>本文主要介绍</p>
</blockquote>
<h1 id="1解释一下-flutter-中的热重载">1.解释一下 Flutter 中的热重载？</h1>
<p>热重载功能使您可以快速轻松地在项目中执行实验。它有助于构建 UI、添加新功能、修复错误并加快应用程序开发。要执行 Flutter 应用程序的热重载，请执行以下步骤：</p>
<ul>
<li>在受支持的 Flutter 编辑器或终端窗口中运行应用程序。</li>
<li>修改项目中的任何 Dart 文件。</li>
<li>如果您使用支持 Flutter 的 IDE，则选择 Save All 或单击工具栏上的 Hot Reload 按钮。您可以立即在模拟器或真实设备中看到结果。</li>
</ul>
<h1 id="2flutter-中的构建上下文是什么">2.flutter 中的构建上下文是什么？</h1>
<p><strong>BuildContext</strong> Class 只是对 Widget 在所有<strong>构建</strong>的 Widget 的树结构中的位置的引用。每个<strong>Flutter</strong>小部件都有一个带有<strong>BuildContext</strong>参数的 @override <strong>build</strong> () 方法。</p>
<h1 id="3flutter中的脚手架是什么">3.flutter中的脚手架是什么？</h1>
<p>甲<strong>脚手架</strong>窗口小部件提供了实现的基本材料设计可视布局结构的框架<strong>扑</strong>应用程序。它提供了用于显示抽屉、小吃店和底部床单的 API。看看它的构造函数和它的属性。</p>
<h1 id="4flutter中的material-app是什么">4.flutter中的material app是什么？</h1>
<p><strong>MaterialApp</strong>是一个小部件，它引入了许多有趣的工具，例如 Navigator 或 Theme 来帮助您开发您的<strong>应用程序</strong>。…然后当您想使用 Text 或 InkWell 时，使用引入<strong>Material</strong>实例(如 Scaffold 、 Appbar 、 Dialog 等)的小部件。</p>
<h1 id="5flutter中setstate有什么用">5.flutter中setState有什么用？</h1>
<p>状态对象由框架创建。为了更改您的小部件，您需要更新状态对象，这可以使用可用于有状态小部件的<strong>setState</strong> ()<strong>函数</strong>来完成。<strong>setState</strong> () 设置状态对象的属性，进而触发对 UI 的更新。但是这种技术有其自身的缺点。</p>
<h1 id="6dart-中var和dynamic类型的区别">6.Dart 中“var”和“dynamic”类型的区别？</h1>
<p><strong>dynamic</strong>是所有 Dart 对象的基础类型。在大多数情况下，您不需要明确使用它。</p>
<p><strong>var</strong>是一个关键字，意思是“我不在乎说明这里的类型是什么。” Dart 将用初始化器类型替换<strong>var</strong>关键字，如果没有初始化器，则默认情况下保持<strong>动态</strong>。</p>
<p>如果您希望变量赋值在其生命周期内发生变化，请使用<strong>var</strong>：</p>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart"><span style="color:#66d9ef">var</span> msg <span style="color:#f92672">=</span> <span style="color:#e6db74">&#34;Hello world.&#34;</span>;
msg <span style="color:#f92672">=</span> <span style="color:#e6db74">&#34;Hello world again.&#34;</span>;
</code></pre></div><p>如果您希望变量赋值在其生命周期内保持不变，请使用<strong>final</strong>：</p>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart"><span style="color:#66d9ef">final</span> msg <span style="color:#f92672">=</span> <span style="color:#e6db74">&#34;Hello world.&#34;</span>;
</code></pre></div><p>使用<strong>final</strong>(自由地)将帮助您发现您无意中更改了变量赋值的情况。</p>
<p>请注意，在对象方面，<strong>final</strong>和<strong>const</strong>之间存在细微差别。 <strong>final</strong>不一定使对象本身不可变，而<strong>const</strong>则：</p>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart"><span style="color:#75715e">// can add/remove from this list, but cannot assign a new list to fruit.
</span><span style="color:#75715e"></span><span style="color:#66d9ef">final</span> fruit <span style="color:#f92672">=</span> [<span style="color:#e6db74">&#34;apple&#34;</span>, <span style="color:#e6db74">&#34;pear&#34;</span>, <span style="color:#e6db74">&#34;orange&#34;</span>];
fruit.add(<span style="color:#e6db74">&#34;grape&#34;</span>);

<span style="color:#75715e">// cannot mutate the list or assign a new list to cars.
</span><span style="color:#75715e"></span><span style="color:#66d9ef">final</span> cars <span style="color:#f92672">=</span> <span style="color:#66d9ef">const</span> [<span style="color:#e6db74">&#34;Honda&#34;</span>, <span style="color:#e6db74">&#34;Toyota&#34;</span>, <span style="color:#e6db74">&#34;Ford&#34;</span>];

<span style="color:#75715e">// const requires a constant assignment, whereas final will accept both:
</span><span style="color:#75715e"></span><span style="color:#66d9ef">const</span> names <span style="color:#f92672">=</span> <span style="color:#66d9ef">const</span> [<span style="color:#e6db74">&#34;John&#34;</span>, <span style="color:#e6db74">&#34;Jane&#34;</span>, <span style="color:#e6db74">&#34;Jack&#34;</span>];
</code></pre></div><p>在<a href="https://dartpad.dartlang.org/">DartPad 中</a>试试这个：</p>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart"><span style="color:#66d9ef">void</span> main() {
  <span style="color:#66d9ef">dynamic</span> x <span style="color:#f92672">=</span> <span style="color:#e6db74">&#39;hal&#39;</span>;
  x <span style="color:#f92672">=</span> <span style="color:#ae81ff">123</span>;
  print(x);
  <span style="color:#66d9ef">var</span> a <span style="color:#f92672">=</span> <span style="color:#e6db74">&#39;hal&#39;</span>;
  a <span style="color:#f92672">=</span> <span style="color:#ae81ff">123</span>;
  print(a);
}
</code></pre></div><p>dynamic：可以改变变量的类型，&amp;可以在代码后面改变变量的值。</p>
<p><strong>var：</strong> <em>不能改变</em>变量的TYPE，但可以在代码后面改变变量的VALUE。</p>
<p><strong>final：</strong> <em>不能改变</em>变量的类型，&amp;<em>不能</em>在代码后面<em>改变</em>变量的值。</p>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart"><span style="color:#66d9ef">dynamic</span> v <span style="color:#f92672">=</span> <span style="color:#ae81ff">123</span>;   <span style="color:#75715e">// v is of type int.
</span><span style="color:#75715e"></span>v <span style="color:#f92672">=</span> <span style="color:#ae81ff">456</span>;           <span style="color:#75715e">// changing value of v from 123 to 456.
</span><span style="color:#75715e"></span>v <span style="color:#f92672">=</span> <span style="color:#e6db74">&#39;abc&#39;</span>;         <span style="color:#75715e">// changing type of v from int to String.
</span><span style="color:#75715e"></span>
<span style="color:#66d9ef">var</span> v <span style="color:#f92672">=</span> <span style="color:#ae81ff">123</span>;       <span style="color:#75715e">// v is of type int.
</span><span style="color:#75715e"></span>v <span style="color:#f92672">=</span> <span style="color:#ae81ff">456</span>;           <span style="color:#75715e">// changing value of v from 123 to 456.
</span><span style="color:#75715e"></span>v <span style="color:#f92672">=</span> <span style="color:#e6db74">&#39;abc&#39;</span>;         <span style="color:#75715e">// ERROR: can&#39;t change type of v from int to String.
</span><span style="color:#75715e"></span>
<span style="color:#66d9ef">final</span> v <span style="color:#f92672">=</span> <span style="color:#ae81ff">123</span>;       <span style="color:#75715e">// v is of type int.
</span><span style="color:#75715e"></span>v <span style="color:#f92672">=</span> <span style="color:#ae81ff">456</span>;           <span style="color:#75715e">// ERROR: can&#39;t change value of v from 123 to 456.
</span><span style="color:#75715e"></span>v <span style="color:#f92672">=</span> <span style="color:#e6db74">&#39;abc&#39;</span>;         <span style="color:#75715e">// ERRO
</span></code></pre></div><h1 id="7dart-支持命名可选参数和位置可选参数两者之间有什么区别">7.Dart 支持命名可选参数和位置可选参数。两者之间有什么区别？</h1>
<p>Dart 有两种类型的可选参数：<em>named</em>和<em>positional</em>。在我讨论差异之前，让我先讨论相似之处。</p>
<p>Dart 的可选参数是<em>可选</em>的，因为调用者在调用函数时不需要为参数指定值。</p>
<p>可选参数只能在任何必需参数之后声明。</p>
<p>可选参数可以有一个默认值，在调用者没有指定值时使用。</p>
<p><strong>位置可选参数</strong></p>
<p>包裹的参数<code>[ ]</code>是一个位置可选参数。下面是一个例子：</p>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart">getHttpUrl(<span style="color:#66d9ef">String</span> server, <span style="color:#66d9ef">String</span> path, [<span style="color:#66d9ef">int</span> port<span style="color:#f92672">=</span><span style="color:#ae81ff">80</span>]) {
  <span style="color:#75715e">// ...
</span><span style="color:#75715e"></span>}
</code></pre></div><p>在上面的代码中，<code>port</code>是可选的，默认值为<code>80</code>。</p>
<p>您可以<code>getHttpUrl</code>使用或不使用第三个参数进行调用。</p>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart">getHttpUrl(<span style="color:#e6db74">&#39;example.com&#39;</span>, <span style="color:#e6db74">&#39;/index.html&#39;</span>, <span style="color:#ae81ff">8080</span>); <span style="color:#75715e">// port == 8080
</span><span style="color:#75715e"></span>getHttpUrl(<span style="color:#e6db74">&#39;example.com&#39;</span>, <span style="color:#e6db74">&#39;/index.html&#39;</span>);       <span style="color:#75715e">// port == 80
</span></code></pre></div><p>您可以为一个函数指定多个位置参数：</p>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart">getHttpUrl(<span style="color:#66d9ef">String</span> server, <span style="color:#66d9ef">String</span> path, [<span style="color:#66d9ef">int</span> port<span style="color:#f92672">=</span><span style="color:#ae81ff">80</span>, <span style="color:#66d9ef">int</span> numRetries<span style="color:#f92672">=</span><span style="color:#ae81ff">3</span>]) {
  <span style="color:#75715e">// ...
</span><span style="color:#75715e"></span>}
</code></pre></div><p>可选参数是<em>位置</em>参数，<code>port</code>如果要指定<code>numRetries</code>.</p>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart">getHttpUrl(<span style="color:#e6db74">&#39;example.com&#39;</span>, <span style="color:#e6db74">&#39;/index.html&#39;</span>);
getHttpUrl(<span style="color:#e6db74">&#39;example.com&#39;</span>, <span style="color:#e6db74">&#39;/index.html&#39;</span>, <span style="color:#ae81ff">8080</span>);
getHttpUrl(<span style="color:#e6db74">&#39;example.com&#39;</span>, <span style="color:#e6db74">&#39;/index.html&#39;</span>, <span style="color:#ae81ff">8080</span>, <span style="color:#ae81ff">5</span>);
</code></pre></div><p>当然，除非您应该知道 8080 和 5 是什么，否则很难说出那些看似神奇的数字是什么。您可以使用<em>命名的可选参数</em>来创建更具可读性的 API。</p>
<p><strong>命名的可选参数</strong></p>
<p>包装的参数<code>{ }</code>是一个命名的可选参数。下面是一个例子：</p>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart">getHttpUrl(<span style="color:#66d9ef">String</span> server, <span style="color:#66d9ef">String</span> path, {<span style="color:#66d9ef">int</span> port <span style="color:#f92672">=</span> <span style="color:#ae81ff">80</span>}) {
  <span style="color:#75715e">// ...
</span><span style="color:#75715e"></span>}
</code></pre></div><p>您可以<code>getHttpUrl</code>使用或不使用第三个参数进行调用。你<strong>必须</strong>调用函数时使用的参数名称。</p>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart">getHttpUrl(<span style="color:#e6db74">&#39;example.com&#39;</span>, <span style="color:#e6db74">&#39;/index.html&#39;</span>, port: <span style="color:#ae81ff">8080</span>); <span style="color:#75715e">// port == 8080
</span><span style="color:#75715e"></span>getHttpUrl(<span style="color:#e6db74">&#39;example.com&#39;</span>, <span style="color:#e6db74">&#39;/index.html&#39;</span>);             <span style="color:#75715e">// port == 80
</span></code></pre></div><p>您可以为一个函数指定多个命名参数：</p>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart">getHttpUrl(<span style="color:#66d9ef">String</span> server, <span style="color:#66d9ef">String</span> path, {<span style="color:#66d9ef">int</span> port <span style="color:#f92672">=</span> <span style="color:#ae81ff">80</span>, <span style="color:#66d9ef">int</span> numRetries <span style="color:#f92672">=</span> <span style="color:#ae81ff">3</span>}) {
  <span style="color:#75715e">// ...
</span><span style="color:#75715e"></span>}
</code></pre></div><p>因为命名参数是按名称引用的，所以它们的使用顺序可以不同于它们的声明。</p>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart">getHttpUrl(<span style="color:#e6db74">&#39;example.com&#39;</span>, <span style="color:#e6db74">&#39;/index.html&#39;</span>);
getHttpUrl(<span style="color:#e6db74">&#39;example.com&#39;</span>, <span style="color:#e6db74">&#39;/index.html&#39;</span>, port: <span style="color:#ae81ff">8080</span>);
getHttpUrl(<span style="color:#e6db74">&#39;example.com&#39;</span>, <span style="color:#e6db74">&#39;/index.html&#39;</span>, port: <span style="color:#ae81ff">8080</span>, numRetries: <span style="color:#ae81ff">5</span>);
getHttpUrl(<span style="color:#e6db74">&#39;example.com&#39;</span>, <span style="color:#e6db74">&#39;/index.html&#39;</span>, numRetries: <span style="color:#ae81ff">5</span>, port: <span style="color:#ae81ff">8080</span>);
getHttpUrl(<span style="color:#e6db74">&#39;example.com&#39;</span>, <span style="color:#e6db74">&#39;/index.html&#39;</span>, numRetries: <span style="color:#ae81ff">5</span>);
</code></pre></div><p>我相信命名参数使调用站点更易于理解，尤其是当有布尔标志或上下文外的数字时。</p>
<p><strong>检查是否提供了可选参数</strong></p>
<p>不幸的是，您无法区分“未提供可选参数”和“已为可选参数提供默认值”的情况。</p>
<p><strong>注意：<strong>您可以使用位置可选参数</strong>或</strong>命名可选参数，<em>但不能</em>在同一函数或方法中同时使用。不允许出现以下情况。</p>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-dart" data-lang="dart">thisFunctionWontWork(<span style="color:#66d9ef">String</span> foo, [<span style="color:#66d9ef">String</span> positonal], {<span style="color:#66d9ef">String</span> named}) {
  <span style="color:#75715e">// will not work!
</span><span style="color:#75715e"></span>}
</code></pre></div>
        </div>

        
<div class="post-archive">
    <ul class="post-copyright">
        <li><strong>原文作者：</strong><a rel="author" href="https://luckly.work/">luckly</a></li>
        <li style="word-break:break-all"><strong>原文链接：</strong><a href="https://luckly.work/post/Flutter/flutter%E9%9D%A2%E8%AF%95%E9%A2%983%E4%B9%8B%E5%B8%B8%E8%A7%81%E5%BC%80%E5%8F%91%E9%97%AE%E9%A2%98/">https://luckly.work/post/Flutter/flutter%E9%9D%A2%E8%AF%95%E9%A2%983%E4%B9%8B%E5%B8%B8%E8%A7%81%E5%BC%80%E5%8F%91%E9%97%AE%E9%A2%98/</a></li>
        <li><strong>版权声明：</strong>本作品采用<a rel="license" href="https://creativecommons.org/licenses/by-nc-nd/4.0/">知识共享署名-非商业性使用-禁止演绎 4.0 国际许可协议</a>进行许可，非商业转载请注明出处（作者，原文链接），商业转载请联系作者获得授权。</li>
    </ul>
</div>
<br/>



        

<div class="post-archive">
    <h2>See Also</h2>
    <ul class="listing">
        
        <li><a href="/post/Flutter/flutter%E9%9D%A2%E8%AF%95%E9%A2%982%E4%B9%8B%E5%B8%B8%E8%A7%81%E5%BC%80%E5%8F%91%E9%97%AE%E9%A2%98/">Flutter面试题2之常见开发问题</a></li>
        
        <li><a href="/post/Flutter/flutter%E6%9E%B6%E6%9E%84-%E6%88%91%E7%9A%84provider%E5%AE%9E%E6%96%BD%E6%8C%87%E5%8D%97/">Flutter架构 我的provider实施指南</a></li>
        
        <li><a href="/post/Flutter/flutter%E9%9D%A2%E8%AF%95%E9%A2%981/">Flutter面试题1</a></li>
        
        <li><a href="/post/flutter_tips/Flutter%E5%B8%B8%E7%94%A8%E7%9A%84%E5%BF%AB%E6%8D%B7%E9%94%AE-AS/">《Flutter常用的快捷键 AS》</a></li>
        
        <li><a href="/post/flutter_tips/Flutter%E5%AF%B9list%E6%8E%92%E5%BA%8F/">《如何根据函数返回的值对dart中的List进行排序》</a></li>
        
    </ul>
</div>


        <div class="post-meta meta-tags">
            
            <ul class="clearfix">
                
                <li><a href='/tags/Flutter'>Flutter</a></li>
                
            </ul>
            
        </div>
    </article>
    
    

    
    
    <div class="post bg-white">
      <script src="https://utteranc.es/client.js"
            repo= "https://github.com/ITmxs/repo"
            issue-term="pathname"
            theme="github-light"
            crossorigin="anonymous"
            async>
      </script>
    </div>
    
</div>

                    <footer id="footer">
    <div>
        &copy; 2021 <a href="https://luckly.work/">早起的年轻人 By luckly</a>
        
        | <a rel="nofollow" target="_blank" href="http://beian.miit.gov.cn/">粤ICP备2021号-1</a>
        
    </div>
    <br />
    <div>
        <div class="github-badge">
            <a href="https://juejin.cn/user/3843548384077192" target="_black" rel="nofollow"><span class="badge-subject">Powered by</span><span class="badge-value bg-blue">掘金</span></a>
        </div>
        <div class="github-badge">
            <a href="https://space.bilibili.com/480883651" target="_black"><span class="badge-subject">Design by</span><span class="badge-value bg-brightgreen">早起的年轻人</span></a>
        </div>
        <div class="github-badge">
            <a href="https://cloud.tencent.com/developer/user/6702670" target="_black"><span class="badge-subject">Theme</span><span class="badge-value bg-yellowgreen">云社区</span></a>
        </div>
    </div>
</footer>


    
    <script type="text/javascript">
        window.MathJax = {
            tex2jax: {
                inlineMath: [['$', '$']],
                processEscapes: true
                }
            };
    </script>
    <script src='https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js?config=TeX-MML-AM_CHTML' async></script><script src="https://cdn.bootcdn.net/ajax/libs/fancybox/3.5.7/jquery.fancybox.min.js"></script>

<a id="rocket" href="#top"></a>
<script type="text/javascript" src='/js/totop.js?v=0.0.0' async=""></script>



    <script type="text/javascript" src="//busuanzi.ibruce.info/busuanzi/2.3/busuanzi.pure.mini.js" async></script>




    <script src='/js/douban.js'></script>
    <script src="/js/copy-to-clipboard.js"></script>

                </div>

                <div id="secondary">
    <section class="widget">
        <form id="search" action='https://luckly.work/search/' method="get" accept-charset="utf-8" target="_blank" _lpchecked="1">
      
      <input type="text" name="q" maxlength="20" placeholder="Search">
      <input type="hidden" name="sitesearch" value="https://luckly.work/">
      <button type="submit" class="submit icon-search"></button>
</form>
    </section>
    
    <section class="widget">
        <h3 class="widget-title">最近文章</h3>
<ul class="widget-list">
    
    <li>
        <a href="https://luckly.work/post/nginx/nginx%E6%96%87%E4%BB%B6%E5%86%85%E5%AE%B9/" title="Nginx文件内容">Nginx文件内容</a>
    </li>
    
    <li>
        <a href="https://luckly.work/post/nginx/nginx%E6%9E%81%E7%AE%80%E6%95%99%E7%A8%8B/" title="Nginx极简教程">Nginx极简教程</a>
    </li>
    
    <li>
        <a href="https://luckly.work/post/nginx/%E5%8D%81%E5%88%86%E9%92%9F%E5%85%A5%E9%97%A8nginx/" title="十分钟入门Nginx">十分钟入门Nginx</a>
    </li>
    
    <li>
        <a href="https://luckly.work/post/go/Goland%E8%BF%9C%E7%A8%8B%E5%BC%80%E5%8F%91%E9%85%8D%E7%BD%AE/" title="Goland远程开发配置">Goland远程开发配置</a>
    </li>
    
    <li>
        <a href="https://luckly.work/post/%E8%AF%BB%E4%B9%A6/%E5%9F%9F%E5%90%8D%E8%A7%A3%E6%9E%90/" title="域名解析">域名解析</a>
    </li>
    
    <li>
        <a href="https://luckly.work/post/git/%E6%8F%90%E4%BA%A4%E8%BF%87%E7%A8%8B%E7%9C%81%E7%95%A5%E6%9F%90%E4%BA%9B%E6%96%87%E4%BB%B6/" title="提交过程省略某些文件">提交过程省略某些文件</a>
    </li>
    
    <li>
        <a href="https://luckly.work/post/flutter_tips/Flutter_DropdownButton%E7%A4%BA%E4%BE%8B/" title="Flutter_DropdownButton示例">Flutter_DropdownButton示例</a>
    </li>
    
    <li>
        <a href="https://luckly.work/post/flutter_tips/Flutter_ExpansionPanelList%E5%92%8CExpansionPanelList.radio%E7%A4%BA%E4%BE%8B/" title="Flutter_ExpansionPanelList和ExpansionPanelList">Flutter_ExpansionPanelList和ExpansionPanelList</a>
    </li>
    
    <li>
        <a href="https://luckly.work/post/flutter_tips/Flutter%E5%BE%AE%E4%BF%A1%E5%88%86%E4%BA%AB%E9%93%BE%E6%8E%A5%E8%B7%B3%E5%9B%9EApp%E6%8C%87%E5%AE%9A%E9%A1%B5%E9%9D%A2/" title="Flutter微信分享链接跳回App指定页面">Flutter微信分享链接跳回App指定页面</a>
    </li>
    
    <li>
        <a href="https://luckly.work/post/%E4%BF%A1%E6%81%AF%E7%B3%BB%E7%BB%9F/%E5%A4%96%E5%8C%85%E5%8F%AF%E8%83%BD%E7%9A%84%E9%97%AE%E9%A2%98/" title="外包可能的问题">外包可能的问题</a>
    </li>
    
</ul>
    </section>

    

    <section class="widget">
        <h3 class="widget-title"><a href='/categories/'>分类</a></h3>
<ul class="widget-list">
    
    <li><a href="https://luckly.work/categories/Flutter/">Flutter (326)</a></li>
    
    <li><a href="https://luckly.work/categories/IT/">IT (2)</a></li>
    
    <li><a href="https://luckly.work/categories/Kotlin/">Kotlin (2)</a></li>
    
    <li><a href="https://luckly.work/categories/Mysql/">Mysql (1)</a></li>
    
    <li><a href="https://luckly.work/categories/nginx/">nginx (1)</a></li>
    
    <li><a href="https://luckly.work/categories/Vue/">Vue (6)</a></li>
    
    <li><a href="https://luckly.work/categories/YouTube%E8%A7%86%E9%A2%91%E4%B8%8B%E8%BD%BD/">YouTube视频下载 (1)</a></li>
    
    <li><a href="https://luckly.work/categories/android/">android (6)</a></li>
    
    <li><a href="https://luckly.work/categories/dart/">dart (96)</a></li>
    
    <li><a href="https://luckly.work/categories/Flutter/">Flutter (28)</a></li>
    
    <li><a href="https://luckly.work/categories/gin/">gin (25)</a></li>
    
    <li><a href="https://luckly.work/categories/git/">git (4)</a></li>
    
    <li><a href="https://luckly.work/categories/Go/">Go (102)</a></li>
    
    <li><a href="https://luckly.work/categories/gorm/">gorm (4)</a></li>
    
    <li><a href="https://luckly.work/categories/grpc/">grpc (1)</a></li>
    
    <li><a href="https://luckly.work/categories/html/">html (3)</a></li>
    
    <li><a href="https://luckly.work/categories/ios/">ios (1)</a></li>
    
    <li><a href="https://luckly.work/categories/linux/">linux (1)</a></li>
    
    <li><a href="https://luckly.work/categories/nginx/">nginx (6)</a></li>
    
    <li><a href="https://luckly.work/categories/python/">python (35)</a></li>
    
    <li><a href="https://luckly.work/categories/read/">读书笔记 (6)</a></li>
    
    <li><a href="https://luckly.work/categories/redis/">redis (2)</a></li>
    
    <li><a href="https://luckly.work/categories/%E4%B8%AA%E4%BA%BA%E8%B5%84%E6%96%99/">个人资料 (1)</a></li>
    
    <li><a href="https://luckly.work/categories/%E4%B9%A6%E5%8D%95/">书单 (8)</a></li>
    
    <li><a href="https://luckly.work/categories/%E4%B9%A6%E8%AF%84/">书评 (1)</a></li>
    
    <li><a href="https://luckly.work/categories/%E4%BF%A1%E6%81%AF%E7%B3%BB%E7%BB%9F%E7%AE%A1%E7%90%86%E5%B8%88/">信息系统管理师 (19)</a></li>
    
    <li><a href="https://luckly.work/categories/%E4%BF%A1%E6%81%AF%E7%B3%BB%E7%BB%9F%E9%A1%B9%E7%9B%AE%E7%AE%A1%E7%90%86%E5%B8%88/">信息系统项目管理师 (25)</a></li>
    
    <li><a href="https://luckly.work/categories/%E5%8E%9F%E5%88%99/">原则 (1)</a></li>
    
    <li><a href="https://luckly.work/categories/%E5%8E%9F%E7%94%9F%E9%80%9A%E8%AE%AF/">原生通讯 (1)</a></li>
    
    <li><a href="https://luckly.work/categories/%E5%9F%BA%E7%A1%80/">基础 (1)</a></li>
    
    <li><a href="https://luckly.work/categories/%E5%A4%8D%E5%88%A9%E6%95%88%E5%BA%94/">复利效应 (1)</a></li>
    
    <li><a href="https://luckly.work/categories/%E5%AE%89%E8%A3%85%E6%95%99%E7%A8%8B/">安装教程 (1)</a></li>
    
    <li><a href="https://luckly.work/categories/%E5%B0%91%E6%9C%89%E4%BA%BA%E8%B5%B0%E7%9A%84%E8%B7%AF/">少有人走的路 (1)</a></li>
    
    <li><a href="https://luckly.work/categories/%E5%BF%83%E8%AF%AD/">心语 (3)</a></li>
    
    <li><a href="https://luckly.work/categories/%E6%8F%92%E4%BB%B6/">插件 (2)</a></li>
    
    <li><a href="https://luckly.work/categories/%E6%95%99%E5%AD%A6/">教学 (1)</a></li>
    
    <li><a href="https://luckly.work/categories/%E7%8E%8B%E9%98%B3%E6%98%8E/">王阳明 (3)</a></li>
    
    <li><a href="https://luckly.work/categories/%E7%94%B5%E5%AD%90%E4%B9%A6/">电子书 (1)</a></li>
    
    <li><a href="https://luckly.work/categories/%E7%99%BB%E9%99%86%E8%A1%A8%E5%8D%95/">登陆表单 (1)</a></li>
    
    <li><a href="https://luckly.work/categories/%E7%A8%BB%E7%9B%9B%E5%92%8C%E5%A4%AB/">稻盛和夫 (1)</a></li>
    
    <li><a href="https://luckly.work/categories/%E7%A9%B7%E7%88%B8%E7%88%B8%E5%AF%8C%E7%88%B8%E7%88%B8/">穷爸爸富爸爸 (1)</a></li>
    
    <li><a href="https://luckly.work/categories/%E7%B2%BE%E8%BF%9B/">精进 (3)</a></li>
    
    <li><a href="https://luckly.work/categories/%E7%BC%96%E7%A8%8B/">编程 (1)</a></li>
    
    <li><a href="https://luckly.work/categories/%E8%99%9A%E5%B9%BB/">虚幻 (1)</a></li>
    
    <li><a href="https://luckly.work/categories/%E8%B4%A2%E5%8A%A1%E8%87%AA%E7%94%B1%E4%B9%8B%E8%B7%AF/">财务自由之路 (2)</a></li>
    
    <li><a href="https://luckly.work/categories/%E8%B7%91%E6%AD%A5/">跑步 (1)</a></li>
    
    <li><a href="https://luckly.work/categories/%E8%B7%AF%E7%94%B1%E4%BC%A0%E5%8F%82/">路由传参 (1)</a></li>
    
    <li><a href="https://luckly.work/categories/%E8%B7%AF%E7%BA%BF/">路线 (1)</a></li>
    
    <li><a href="https://luckly.work/categories/%E8%BD%AF%E4%BB%B6%E5%AE%9E%E6%96%BD/">软件实施 (1)</a></li>
    
    <li><a href="https://luckly.work/categories/%E9%98%B3%E6%98%8E%E5%BF%83%E5%AD%A6/">阳明心学 (3)</a></li>
    
    <li><a href="https://luckly.work/categories/%E9%A1%B9%E7%9B%AE/">项目 (1)</a></li>
    
    <li><a href="https://luckly.work/categories/%E9%AD%85%E5%8A%9B/">魅力 (1)</a></li>
    
</ul>
    </section>

    <section class="widget">
        <h3 class="widget-title"><a href='/tags/'>标签</a></h3>
<div class="tagcloud">
    
    <a href="https://luckly.work/tags/flutter/">flutter</a>
    
    <a href="https://luckly.work/tags/IT/">IT</a>
    
    <a href="https://luckly.work/tags/Kotlin/">Kotlin</a>
    
    <a href="https://luckly.work/tags/Mysql/">Mysql</a>
    
    <a href="https://luckly.work/tags/nginx/">nginx</a>
    
    <a href="https://luckly.work/tags/Vue/">Vue</a>
    
    <a href="https://luckly.work/tags/YouTube%E8%A7%86%E9%A2%91%E4%B8%8B%E8%BD%BD/">YouTube视频下载</a>
    
    <a href="https://luckly.work/tags/android/">android</a>
    
    <a href="https://luckly.work/tags/dart/">dart</a>
    
    <a href="https://luckly.work/tags/flutter/">flutter</a>
    
    <a href="https://luckly.work/tags/gin/">gin</a>
    
    <a href="https://luckly.work/tags/git/">git</a>
    
    <a href="https://luckly.work/tags/go/">go</a>
    
    <a href="https://luckly.work/tags/gorm/">gorm</a>
    
    <a href="https://luckly.work/tags/grpc/">grpc</a>
    
    <a href="https://luckly.work/tags/html/">html</a>
    
    <a href="https://luckly.work/tags/ios/">ios</a>
    
    <a href="https://luckly.work/tags/linux/">linux</a>
    
    <a href="https://luckly.work/tags/nginx/">nginx</a>
    
    <a href="https://luckly.work/tags/python/">python</a>
    
    <a href="https://luckly.work/tags/redis/">redis</a>
    
    <a href="https://luckly.work/tags/%E4%B8%AA%E4%BA%BA%E8%B5%84%E6%96%99/">个人资料</a>
    
    <a href="https://luckly.work/tags/%E4%B9%A6%E5%8D%95/">书单</a>
    
    <a href="https://luckly.work/tags/%E4%B9%A6%E8%AF%84/">书评</a>
    
    <a href="https://luckly.work/tags/%E4%BF%A1%E6%81%AF%E7%B3%BB%E7%BB%9F%E7%AE%A1%E7%90%86%E5%B8%88/">信息系统管理师</a>
    
    <a href="https://luckly.work/tags/%E4%BF%A1%E6%81%AF%E7%B3%BB%E7%BB%9F%E9%A1%B9%E7%9B%AE%E7%AE%A1%E7%90%86%E5%B8%88/">信息系统项目管理师</a>
    
    <a href="https://luckly.work/tags/%E5%85%A5%E9%97%A8/">入门</a>
    
    <a href="https://luckly.work/tags/%E5%8E%9F%E5%88%99/">原则</a>
    
    <a href="https://luckly.work/tags/%E5%8E%9F%E7%94%9F%E9%80%9A%E8%AE%AF/">原生通讯</a>
    
    <a href="https://luckly.work/tags/%E5%9F%BA%E7%A1%80/">基础</a>
    
    <a href="https://luckly.work/tags/%E5%A4%8D%E5%88%A9%E6%95%88%E5%BA%94/">复利效应</a>
    
    <a href="https://luckly.work/tags/%E5%AE%89%E8%A3%85%E6%95%99%E7%A8%8B/">安装教程</a>
    
    <a href="https://luckly.work/tags/%E5%B0%91%E6%9C%89%E4%BA%BA%E8%B5%B0%E7%9A%84%E8%B7%AF/">少有人走的路</a>
    
    <a href="https://luckly.work/tags/%E5%BF%83%E8%AF%AD/">心语</a>
    
    <a href="https://luckly.work/tags/%E6%8F%92%E4%BB%B6/">插件</a>
    
    <a href="https://luckly.work/tags/%E6%95%99%E5%AD%A6/">教学</a>
    
    <a href="https://luckly.work/tags/%E7%8E%8B%E9%98%B3%E6%98%8E/">王阳明</a>
    
    <a href="https://luckly.work/tags/%E7%94%B5%E5%AD%90%E4%B9%A6/">电子书</a>
    
    <a href="https://luckly.work/tags/%E7%99%BB%E9%99%86%E8%A1%A8%E5%8D%95/">登陆表单</a>
    
    <a href="https://luckly.work/tags/%E7%A8%BB%E7%9B%9B%E5%92%8C%E5%A4%AB/">稻盛和夫</a>
    
    <a href="https://luckly.work/tags/%E7%A9%B7%E7%88%B8%E7%88%B8%E5%AF%8C%E7%88%B8%E7%88%B8/">穷爸爸富爸爸</a>
    
    <a href="https://luckly.work/tags/%E7%B2%BE%E8%BF%9B/">精进</a>
    
    <a href="https://luckly.work/tags/%E7%BC%96%E7%A8%8B/">编程</a>
    
    <a href="https://luckly.work/tags/%E8%99%9A%E5%B9%BB/">虚幻</a>
    
    <a href="https://luckly.work/tags/%E8%AF%97/">诗</a>
    
    <a href="https://luckly.work/tags/%E8%AF%BB%E4%B9%A6%E7%AC%94%E8%AE%B0/">读书笔记</a>
    
    <a href="https://luckly.work/tags/%E8%B4%A2%E5%8A%A1%E8%87%AA%E7%94%B1%E4%B9%8B%E8%B7%AF/">财务自由之路</a>
    
    <a href="https://luckly.work/tags/%E8%B7%91%E6%AD%A5/">跑步</a>
    
    <a href="https://luckly.work/tags/%E8%B7%AF%E7%94%B1%E4%BC%A0%E5%8F%82/">路由传参</a>
    
    <a href="https://luckly.work/tags/%E8%B7%AF%E7%BA%BF/">路线</a>
    
    <a href="https://luckly.work/tags/%E8%BD%AF%E4%BB%B6%E5%AE%9E%E6%96%BD/">软件实施</a>
    
    <a href="https://luckly.work/tags/%E9%80%9A%E8%AE%AF%E5%BD%95/">通讯录</a>
    
    <a href="https://luckly.work/tags/%E9%98%B3%E6%98%8E%E5%BF%83%E5%AD%A6/">阳明心学</a>
    
    <a href="https://luckly.work/tags/%E9%A1%B9%E7%9B%AE/">项目</a>
    
    <a href="https://luckly.work/tags/%E9%AD%85%E5%8A%9B/">魅力</a>
    
</div>
    </section>

    
<section class="widget">
    <h3 class="widget-title">友情链接</h3>
    <ul class="widget-list">
        
        <li>
            <a target="_blank" href="http://www.topgoer.com/" title="枯藤">枯藤</a>
        </li>
        
        <li>
            <a target="_blank" href="https://gorm.cn/zh_CN/docs/index.html" title="gorm">gorm</a>
        </li>
        
        <li>
            <a target="_blank" href="https://docs.python.org/zh-cn/3/tutorial/index.html" title="python">python</a>
        </li>
        
        <li>
            <a target="_blank" href="https://www.liwenzhou.com/" title="李文周">李文周的博客</a>
        </li>
        
        <li>
            <a target="_blank" href="http://www.xbzweb.com/" title="小包子的博客">小包子的博客</a>
        </li>
        
        <li>
            <a target="_blank" href="https://www.flysnow.org/" title="飞雪无情的博客">飞雪无情的博客</a>
        </li>
        
        <li>
            <a target="_blank" href="https://sliverhorn.com/" title="sliverhorn的博客">sliverhorn的博客</a>
        </li>
        
        <li>
            <a target="_blank" href="http://yuedu.baidu.com/ebook/14a722970740be1e640e9a3e" title="Android Gradle权威指南">Android Gradle权威指南</a>
        </li>
        
        <li>
            <a target="_blank" href="https://gesdh.cn/" title="小格子">格子导航</a>
        </li>
        
        <li>
            <a target="_blank" href="https://itachi.xyz/" title="阿林">itachi&#39;s Blog</a>
        </li>
        
        <li>
            <a target="_blank" href="https://darjun.github.io/" title="大俊">大俊Blog</a>
        </li>
        
        <li>
            <a target="_blank" href="https://geektutu.com/post/quick-golang.html" title="极客兔兔">极客兔兔Blog</a>
        </li>
        
        <li>
            <a target="_blank" href="http://zxfcumtcs.github.io/" title="赵雪峰">雪峰Blog</a>
        </li>
        
    </ul>
</section>


    <section class="widget">
        <h3 class="widget-title">其它</h3>
        <ul class="widget-list">
            <li><a href="https://luckly.work/index.xml">文章 RSS</a></li>
        </ul>
    </section>
</div>
            </div>
        </div>
    </div>
</body>

</html>